Gamma Trianguli Australis

Gamma Trianguli Australis
Location of γ Trianguli Australis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Triangulum Australe
Right ascension 15h 18m 54.58129s[1]
Declination –68° 40′ 46.3680″[1]
Apparent magnitude (V) +2.87[2]
Characteristics
Evolutionary stage Subgiant or giant star[3]
Spectral type A1III[3]
U−B color index –0.02[4]
B−V color index +0.00[4]
Astrometry
Radial velocity (Rv)–3.0[2] km/s
Proper motion (μ) RA: –65.816 mas/yr[1]
Dec.: –31.187 mas/yr[1]
Parallax (π)17.1809 ± 0.3327 mas[1]
Distance190 ± 4 ly
(58 ± 1 pc)[1]
Absolute magnitude (MV)−0.89[5]
Details[3]
Mass3.04 M☉
Radius6.5 or 7 R☉
Luminosity249[6] L☉
Surface gravity (log g)3.39[7] cgs
Temperature8,225 K
Rotational velocity (v sin i)199[8] km/s
Age350 Myr
Other designations
γ TrA, CD−68° 1503, FK5 560, HD 135382, HIP 74946, HR 5671, SAO 253097[9]
Database references
SIMBADdata

Gamma Trianguli Australis, Latinized from γ Trianguli Australis, is a single,[10] white-hued star in the southern constellation of Triangulum Australe. Along with Alpha and Beta Trianguli Australis it forms a prominent triangular asterism that gives the constellation its name (Latin for southern triangle). It is the third-brightest member of this constellation with an apparent visual magnitude of +2.87.[2] Based upon parallax measurements, Gamma Trianguli Australis is located at a distance of about 190 light-years (58 parsecs) from Earth.[1]

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  4. ^ a b Cite error: The named reference clpl4 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference David2015 was invoked but never defined (see the help page).
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  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).